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Re: High Frequency Compression Driver EvaluationI just thought of something that may cause a slight measurement difference with the EV diaphragms. I have cut the diaphragm out of some of the back cap assemblies over the years. While most have about a 1/4 inch thick piece of foam glued to the inside of the cap a couple of them did not, just the hard plastic was exposed. If I can find any of those caps I'll check the serial numbers to see if there is some pattern to those with and with out. ( I have no idea why I keep old diaphragms!)For what's it's worth the biggest failure I've seen with them is cracking in the surround at the point where the voice coil is glued to the diaphragm.
Re: High Frequency Compression Driver Evaluation
I just thought of something that may cause a slight measurement difference with the EV diaphragms. I have cut the diaphragm out of some of the back cap assemblies over the years. While most have about a 1/4 inch thick piece of foam glued to the inside of the cap a couple of them did not, just the hard plastic was exposed. If I can find any of those caps I'll check the serial numbers to see if there is some pattern to those with and with out. ( I have no idea why I keep old diaphragms!)
For what's it's worth the biggest failure I've seen with them is cracking in the surround at the point where the voice coil is glued to the diaphragm.
